i don't believe in working too hard .work为什么加ing

i don't believe in working too hard .work为什么加ing
i don't believe in working too hard .work为什么加ing

i don't believe in working too hard .work为什么加ing
介词in 后面用名字或者动名词ing 介词都是这样

believe in 的in是介词，后面跟ving

in是介词 后面加动词ing形式